Printing cylinder for intaglio printing machines



' A. .GUTMANN Oct. 4, 1932.

PRINTING CYLINDER FOR INTAGLIO PRINTINGMACHINES Filed April 11. 1931 Inventor: imam! all/M61212 I altar/2g.-

Patented Oct. 4, 1932 UNITED STATES ARMANDO GUTMANN, OF TURIN, ITALY.

PRINTING CYLINDER FOR INTAGLIO IPIRILI'IIIZITG MAfiHINES Application filed April 11,

My present invention relates to printing cylinders of intaglio printing machines and 1t has for its object an improved printing I cylinder of this type intended to carry the impression or design plate or sheet.

7 More particularly my invention has-for its object to provide means whereby the impression or design plate or sheet, usually made of copper or other metal, may be readily secured on the peripheral surface of the printing cylinder and placed under tension, said means being operable from one end of the printing cylinder.

According to my invention I provide a hollow cylinder, the opposite ends or heads of which are provided with hub members constituting at the same time the journals or bearing surfaces of the cylinder. Extending through said hub members is a shaft supported thereby.

Provided in the peripheral surface of the cylinder are two diametrically opposed gaps, one of which receives'a fixed comb serving to guide and adjust a movable comb'supported on three or more internal brackets made integral with the shaft, whilst the second gap serves to facilitate the} mounting of the inner parts, said second gap being I subsequently closed by means of an armature or block flush with the outer peripheral surface of the cylinder. Arranged at one end of the cylinder is an operating mechanism enabling the inner shaft tobe rotated to a a sheet or plate onto the cylinder.-

desired angle for moving the movable comb to the amount required for. placingv under tension and attach the impression or design In order that the invention may beclearly understood and readily carried into effect, reference is made to the accompanying drawing, wherein: ig. 1 is a longitud'nal section'partly in elevation of my improved cylinder.

Fig. 2. is an elevation of same.

, Figs. 3 and 4 are'two crosssections of the cylinders with the closing or tensioning comb in two different positions. 7 I

Fig. 5 shows the comb operating mechamsm.

the peripheral surface 'of 1931. Serial No. 529,477.

The same reference numerals are used to lndicate corresponding parts in the various views.

The main body of the cylinder 1 has at its opposite ends 2 hub members 3 forming bearing surfaces for the supporting journals 4 of said cylinder. The main body 1 is moreover provided with two longitudinal gaps 5, in one of which the fixed comb 6 and movable comb 7 are arranged, whilst the other gap is '60 closed by means of an armature or block 8. The fixed and movablecombs are provided with teeth 9'serving to guide and adjust the movable comb 7 in its movements. The movable comb 7 is supported on arms 10 fast on 65 the shaft 11 held in the axis of the hub members 3. At one'of the outer. ends of the cylinder the hub member 3 carries a bracket 12 secured thereto for two opposite screw spindles 13, whereby the double link 14 fast on the shaft 11 may be moved in either direction.

By the rotation of the screw spindles 13 in either direction the shaft 11 will'be rotated and said shaft in turn will displace the movable comb 7. With the movable comb in the position shown in Figure 4, there is provided a gap 15 between the, fixed and movable combs, and the inturned ends of the impression sheet, which impression sheet en circles the cylinder, will be inserted into the gap 15, whereupon the operating mechanism. is .actuated to cause the movable comb 7 to move to the position shown in Fig. 3, whereby the impression or design sheet or plate will be secured to the cylinder and placed under ten- S1011.

Having now fully described my said invention, what I claim and desire to secure by Letters Patent, is: I

1'. A means for attaching and tensioning a design plate to the printing cylinder of a printing machine, comprising a movable of the cylinder, one gap serving to facilitate I00 V v I 1,881,075

the mounting of the inner parts, a fixed comb in the second gap arranged to guide and adjust said movable comb, suitable brackets on i r the inner shaft for supporting said movable v comb, a double link on said shaft, and two screw spindles adapted to act on said. double 4 link for rotating the inner shaft andthereby 1 displacing the movable comb, substantially as and for the purpose setforth. I I p 0 7 2. A means for attaching and tensioning a g design plateto the printing cylinder of a Printing wh ner omp is ng. mo abl 7 comb, and inner shaft and means for operat- 4 ing said shaft for the purpose ofdisplacing c said movable comb, ofhub members at the oppositeends of the cylinderforminggsup- 7 7 V gp ortingsjournals therefor and-supporting f said inner shaft, tvvo longitudinal diametri 7 r ically opposed gaps in the peripheral surface 7 0 .Qof the cylinder, one-gap serving tofacilitate {the mountingof theinner parts, and a fixed bomb in the secondgaparrangedto guide and v H ad tr e dlmd bl -c bc I means for attaching and tensioning a v i 2Y design-plate on a cylinderincluding a fixed comb'arranged in'the periphery of 'the c'ylinder, a movablecomb guidediby the 5 fixedco-mb and servinginmovement in one 1 direction to engage andtension one end of I the designplatea member varranged axially of the printing cylinder, means carried by p 7 ythe member for operating the movable comb,

and meansbeyond the ends of the cylinder for V operatingzsaid member. p a i 3 74 4. ;A means for attaching and-tensioning a design plate ona' pr-intingcylinderincluding afixedcombarrangedinthe periphery of the .i

cylinder, a movablecomb guided. by the fixed is comb andiserving in movement in one direc r t 40 .tion to engageand tension'one end ofjthede- 7 sign plate, a shaft extending axially: of the v cylinder and providinga support for the cyl- ',inder, elements carried-bythe shaft and con- V V. nected to thefmovablecombforoperating-the I latter, and me'ans' cooperating with the shaft Y beyond oneend of the cylinder for operating the shaft to ,controlthe movablecomb.

. AHMAND-Q eUTMAN 

